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/*-------------------------------------------------------------------------
 *
 * libpq.h
 *	  POSTGRES LIBPQ buffer structure definitions.
 *
 *
 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/libpq/libpq.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef LIBPQ_H
#define LIBPQ_H

#include <sys/types.h>
#include <netinet/in.h>

#include "lib/stringinfo.h"
#include "libpq/libpq-be.h"

/* ----------------
 * PQArgBlock
 *		Information (pointer to array of this structure) required
 *		for the PQfn() call.  (This probably ought to go somewhere else...)
 * ----------------
 */
typedef struct
{
	int			len;
	int			isint;
	union
	{
		int		   *ptr;		/* can't use void (dec compiler barfs)	 */
		int			integer;
	}			u;
} PQArgBlock;

/*
 * External functions.
 */

/*
 * prototypes for functions in pqcomm.c
 */
extern int	StreamServerPort(int family, char *hostName,
				 unsigned short portNumber, char *unixSocketDir,
				 pgsocket ListenSocket[], int MaxListen);
extern int	StreamConnection(pgsocket server_fd, Port *port);
extern void StreamClose(pgsocket sock);
extern void TouchSocketFiles(void);
extern void pq_init(void);
extern void pq_comm_reset(void);
extern int	pq_getbytes(char *s, size_t len);
extern int	pq_getstring(StringInfo s);
extern void pq_startmsgread(void);
extern void pq_endmsgread(void);
extern bool pq_is_reading_msg(void);
extern int	pq_getmessage(StringInfo s, int maxlen);
extern int	pq_getbyte(void);
extern int	pq_peekbyte(void);
extern int	pq_getbyte_if_available(unsigned char *c);
extern int	pq_putbytes(const char *s, size_t len);
extern int	pq_flush(void);
extern int	pq_flush_if_writable(void);
extern bool pq_is_send_pending(void);
extern int	pq_putmessage(char msgtype, const char *s, size_t len);
extern void pq_putmessage_noblock(char msgtype, const char *s, size_t len);
extern void pq_startcopyout(void);
extern void pq_endcopyout(bool errorAbort);

/*
 * prototypes for functions in be-secure.c
 */
extern char *ssl_cert_file;
extern char *ssl_key_file;
extern char *ssl_ca_file;
extern char *ssl_crl_file;

extern int	secure_initialize(void);
extern bool secure_loaded_verify_locations(void);
extern void secure_destroy(void);
extern int	secure_open_server(Port *port);
extern void secure_close(Port *port);
extern ssize_t secure_read(Port *port, void *ptr, size_t len);
extern ssize_t secure_write(Port *port, void *ptr, size_t len);

#endif   /* LIBPQ_H */
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